getline_error.PNG

I haven't looked at C++ in nearly two decades, but from what I can remember, it should be:

cout << "enter name\n" << endl;

The new line character should be \n instead of /n and also be within the quotes. However, both \n and endl jump to the next line, so you might be adding redundancy you don't need.

Also, aren't you meaning to do cin >> s1.age and not just cin >> age?